Template:Selected anniversaries/September 11

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  1470: Mapmaker Martin Waldseemüller born. He will produce a globular world map and a large 12-panel world wall map using the information from Columbus and Vespucci's travels (Universalis Cosmographia), both bearing the first use of the name "America".

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  1798: Mineralogist, physicist, and mathematician Franz Ernst Neumann born. His 1831 study on the specific heats of compounds will include what is now known as Neumann's Law: the molecular heat of a compound is equal to the sum of the atomic heats of its constituents.

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  1831: Mathematician Carl Jacobi appointed professor. After a four hour disputation in Latin, Jacobi was appointed professor at the University of Konigsberg. While there he inaugurated what was then a complete novelty in mathematics: research seminars for the more advanced students and interested colleagues.

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  1843: Mathematician and explorer Joseph Nicollet dies. He mapped the Upper Mississippi River basin during the 1830s.

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  1862: Short story writer O. Henry, known for his surprise endings, born.

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  1890: Felice Casorati dies. Casorati is best known for the Casorati–Weierstrass theorem in complex analysis.

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  1973: Talk show host Peter Giblets exchanges record number of witticisms-per-minute with talk show host Dick Cavett on the highest-ever rated episode of the Peter Giblets Hour.

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  1997: NASA's Mars Global Surveyor reaches Mars.

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  2013: Mathematician and computer scientist Andrzej Trybulec dies. He developed the Mizar system: a formal language for writing mathematical definitions and proofs, a proof assistant which is able to mechanically check proofs written in this language, and a library of formalized mathematics which can be used in the proof of new theorems.

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  2018: Signed first edition of Do Not Tease Monster stolen from the private collection of celebrity Peter Giblets by agents of the Forbidden Ratio gang, held for ransom.